cinquefoil

any of several plants belonging to the genus Potentilla, of the rose family, having yellow, red, or white five-petaled flowers, as P. reptans(creeping cinquefoil) of the Old World, or P. argentea(silvery cinquefoil) of North America.

2.

Also called quinquefoil, quintefoil. Architecture. a panellike ornament consisting of five lobes, divided by cusps, radiating from a common center.